---
id: "openai/gpt-5.6-sol"
also: ["openai/gpt-5.6-sol-20260709", "requesty/openai/gpt-5.6-sol", "vercel/openai/gpt-5.6-sol"]
card_usd_per_m: "4.0 in, 20.0 out, at openai"
cheapest_list_usd_per_m: "2.0 in, 10.0 out, at openai/flex on openrouter"
cheapest_effective_usd_per_m: "0.7456 in, 20.0 out, at azure@eastus2 on requesty"
context: 1050000
max_output: 128000
input: ["file", "image", "text"]
output: ["text"]
released: "2026-07-09"
reasoning: ["max", "xhigh", "high", "medium", "low", "none"]
api: ["/api/v1/chat/completions", "/api/v1/completions", "/api/v1/messages", "/api/v1/responses"]
params: ["include_reasoning", "max_completion_tokens", "max_tokens", "reasoning", "reasoning_effort", "response_format", "seed", "stop", "structured_outputs", "temperature", "tool_choice", "tools", "verbosity"]
endpoints: 24
gateways: "requesty (12), openrouter (9), vercel (3)"
no_training: 23
trains: 0
retains_prompts: 8
coding: 78.3000
agentic: 47.4000
---
# OpenAI: GPT-5.6 Sol

GPT-5.6 Sol is the flagship model in OpenAI's GPT-5.6 series. It is suited for complex reasoning, coding, and agentic workflows, and is particularly strong at command-line and multi-step coding tasks and long-horizon problem solving.